>> some momentum for mitt romney in those national polls, the daily tracking national polls. he's definitely picked up. also has a lot more excitement with his crowds right now, and it seems like it's re-energized his campaign but what i'll watch are those polls in the key battleground states, places like ohio, virginia, florida, colorado. those have to start closing up for mitt romney, as well. so far they haven't, in fact, there is a new poll out this morning coming out of the university of denver showing barack obama maintains a four-point lead in colorado. >> and it is the battleground states where this race will be won. and lost. >> absolutely. >> very quickly, vice presidential race. any precedent for a vice presidential debate impacting the trajectory of a race? >> not -- probably one of the most serious debate moments ever is that debate moment where lloyd bentson took on dan quayle and said "you're no jack kennedy," but in the end george h.w. bush still won that race. >> george stephanopoulos, thank you very much. great to see you here on the set this morning. george